SVN is

Subversion, also known as svn or SVN, is an open source version control software that can manage software development processes performed by a separate group of programmers into traces and orderly. Subversion was created by CollabNet which holds the trademark "Subversion" and is still preserving this project. The latest version of Subversion is 1.4.4 released on June 8, 2007. Subversion is available in Linux, Windows, FreeBSD, OpenBSD, Solaris, Mac OS X and OS / 400 versions.

Subversion is specifically designed as a modern replacement for CVS. The use of Subversion as an alternative to CVS as a slow version controller began to widen. Projects that use Subversion include Apache Software Foundation, KDE, GNOME, GCC, Python, Samba, Mono, MediaWiki, etc. SourceForge.net has also provided Subversion hosting for open source projects.